多带正交频分复用系统抗窄带干扰技术  

Anti-interference of Multi-Band OFDM System

作　　者：王海洋[1] 颜彪[1] 朱一欢[1] 杨娜[1] 张慧[1] 

机构地区：[1]扬州大学信息工程学院,江苏扬州225009

出　　处：《信息与电子工程》2008年第3期191-195,共5页information and electronic engineering

基　　金：江苏省高校自然科学基础研究项目(07KJD510247)

摘　　要：针对超宽带通信系统存在严重窄带干扰问题,基于传统的超宽带通信系统的解决方案,研究了一种基于窄带抑制正交频分复用的新的超宽带系统。新的系统充分利用一个子带内所有子载波的频率分集性,将子载波的编码数据流扩展到相应子带的所有子载波上,增强了多带正交频分复用系统的抗干扰能力。理论分析和仿真结果均表明,这种方法能进一步提高系统的抗干扰能力。An anti-interference measure based on spreading is investigated to combat the detrimental effects of interference on the Multi-Band Orthogonal Frequency-Division Multiplexing Ultra-Wideband （MB-OFDM-UWB） system. The proposed system based on Interference Suppressing OFDM（IS-OFDM） makes full use of the frequency diversity across all the sub-carriers or the partial ones and spreads the coded bit streams over the sub-carriers with orthogonal spreading sequences, which provides the robustness to narrowband interference. Numerical results obtained from simulations show that this method could enhance the robustness of the system to narrow-band interference effectively.

关 键 词：多带正交频分复用 超宽带 抗窄带干扰 

分 类 号：TN919.3[电子电信—通信与信息系统]